Minify js files with require3/18/2024 ![]() ![]() Choose a bundling and minification strategyĪSP.NET Core is compatible with WebOptimizer, an open-source bundling and minification solution. We recommend testing an app to determine if bundling and minification yields an improved load time. The test app used to generate the figures in the preceding table demonstrates typical improvements that might not apply to a given app. Greater performance gains are realized when using bundling and minification with assets transferred over a network. The load time improved, but this example ran locally. The following table outlines differences between individually loading assets and using bundling and minification for a typical web app. In addition to removing the comments and unnecessary whitespace, the following parameter and variable names were renamed as follows: Original Common side effects of minification include shortening variable names to one character and removing comments and unnecessary whitespace.Ĭonsider the following JavaScript function: AddAltToImg = function (imageTagAndImageID, imageContext) The result is a significant size reduction in requested assets (such as CSS, images, and JavaScript files). Minification removes unnecessary characters from code without altering functionality. This results in improved first page load performance. Fewer files mean fewer HTTP requests from the browser to the server or from the service providing your application. You can create any number of individual bundles specifically for CSS, JavaScript, etc. Bundling reduces the number of server requests that are necessary to render a web asset, such as a web page. Bundlingīundling combines multiple files into a single file. In this case, bundling and minification provide a performance improvement even after the first page request. Additionally, the browser requires a validation request for each asset. If the expires header isn't set correctly on the assets and if bundling and minification isn't used, the browser's freshness heuristics mark the assets stale after a few days. So, bundling and minification don't improve performance when requesting the same page, or pages, on the same site requesting the same assets. Once a web page has been requested, the browser caches the static assets (JavaScript, CSS, and images). ![]() Used together, bundling and minification improve performance by reducing the number of server requests and reducing the size of the requested static assets.īundling and minification primarily improve the first page request load time. What is bundling and minificationīundling and minification are two distinct performance optimizations you can apply in a web app. The YUI - Yahoo userInterface Library Compressor is JavaScript minifier designed to be 100% safe and yield a higher compression ratio than most other tools.The YUI Compressor is also able to compress CSS files by using a port of Isaac Schlueter's regular-expression-based CSS minifier.This article explains the benefits of applying bundling and minification, including how these features can be used with ASP.NET Core web apps. Because, it is very lightweight core library and also it is a free open source Library. But, best one is, YUI Library ( Yahoo userInterface Library ). We have lot of JS and CSS minification online convertor and have lot of JAVA libraries available in internet. For this reason, the minification (also minimisation or minimization) is very important. These unnecessary characters increase file size and it will be affect performance too. These are very important only for code readability, but not needed for execution process. These unnecessary characters usually include white space characters, new line characters, comments, and sometimes block delimiters. Because, normal JS and CSS files having unnecessary characters in source codes. But, now a days most of the developers wants to include only minified JS and CSS files. All web applications has CSS and JS files. ![]()
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